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Round|Natural|GIA

1.51ct K SI2 Round Natural Diamond

EX • K/SI2 • GIA 7491376602

Certificate GIA 7491376602

Diamond specifications and retailer prices

From £3,439 GBP
As of November 4, 2026
Save £3,842 GBP (53%) vs most expensive(unlock to see where)
13 retailers carry this diamond
Most expensive: £7,281 GBP at NZ Jewellers · As of November 5, 2026
View at NZ Jewellers

About this 1.51ct natural round diamond

This 1.51ct natural round sits in the one-and-a-half to two carat band, graded K colour (faint-tinted) and SI2 clarity (slightly-included), with a top-tier cut grade and certified by GIA 7491376602. Listed at 13 retailers as of November 4, 2026, with prices from £3,439 to £7,281, a £3,842 spread on the same certified stone. NZ Jewellers lists it at £7,281. SI-grade stones are eye-clean roughly 60 to 70% of the time at this carat range. Check the inclusion plot on the cert and ask the retailer for high-resolution video before buying.

The 4Cs

1.51
Carat
K
Colour
SI2
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle32.5°
Pavilion angle41.6°
OriginNatural
Grading LabGIA
CertificateGIA 7491376602
Dimensions7.45 × 7.43 × 4.50 mm
L/W Ratio1.00
Star length50%
Lower girdle80%
Girdle conditionFaceted
Culet sizeNone
Cert comments
Additional clouds, additional twinning wisps, pinpoints and surface graining are not shown.
Top View
7.45 mm7.43 mm1.51 ctK / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 7491376602
Side View
Table 60.0%Crown 32.5°Girdle: MED-STKPavilion 41.6°Culet: NoneDepth 60.4%

Caratlytics Score

How it works →
B+
Very Good
Strong quality and value balance
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 4
Current: £7,281 GBP|Low: £3,477 GBP|High: £7,281 GBP|Avg: £4,782 GBP
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
November 5, 2026
Retailer 5£3,477 GBP
Retailer 6£3,944 GBP
Retailer 7£3,944 GBP
Retailer 9£3,944 GBP
Retailer 3£4,177 GBP
Retailer 8£4,551 GBP
Retailer 2£4,725 GBP
Retailer 4£6,396 GBP
NZ Jewellers£7,281 GBP

41 data points across 9 retailers

13 retailers£3,439 GBP to £7,281 GBP

B+
Cheapest Retailer
-
£3,439 GBP
B+
Retailer 2
-
£3,477 GBP
View
B+
Retailer 3
-
£3,671 GBP
View
B
Retailer 4
-
£3,901 GBP
View
B
Retailer 5
-
£3,944 GBP
View
Retailer 6
-
£3,944 GBP
View
Price last confirmed 8 days ago
B
Retailer 7
-
£3,944 GBP
View
B+
Retailer 8
-
£4,177 GBP
View
B
Retailer 9
-
£4,551 GBP
View
B
Retailer 10
-
£4,725 GBP
View
Retailer 11
-
£4,802 GBP
View
Price last confirmed 14 days ago
B
Retailer 12
-
£6,396 GBP
View
Most Expensive
C
NZ Jewellers
2c03ce52-d5a5-4a88-aa87-0d9ab6985084 · Nov 5
£7,281 GBP
$9,800 USD
View
12 more retailers have this diamond
Prices start from £3,439 GBPSave up to £3,842 GBP

Carat Hunter is not affiliated with, endorsed by, or sponsored by any retailer listed. Retailer information is from publicly available sources and may not be current. Verify details directly with the retailer before purchasing. Return terms as we hold them. Check the retailer's own returns page before you buy.

B+
1.51ct Round
£3,439 GBP